Irregular antenna array optimization method based on sub-array factor gain maximization

Abstract

The invention discloses an irregular antenna array sub-array distribution optimization method based on sub-array factor gain maximization. According to the method, an irregular antenna array directional diagram calculation formula is decomposed into a product of a sub-array factor and a sub-array directional diagram, and the sub-array factor plays a decisive role in the radiation performance of an irregular antenna array, so that the maximum sub-array factor gain is firstly established, meanwhile, the integer optimization problem that the antenna array surface is accurately and completely divided is met, and an optimal array topological structure of the irregular antenna array by utilizing an integer optimization solver is solved; and then, according to the optimized array topological structure, a convex optimization problem which takes beam width and peak side lobe level as constraint conditions, takes maximized irregular antenna array gain as a target function and takes sub-array level amplitude-phase excitation as an optimization variable is established, and an efficient solution is solved by using a convex optimization algorithm to avoid direct solving of a complex mixed integer optimization problem.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to the optimization sub-problem of arrays in phased array antennas with limited number of active channels. Specifically, it refers to the establishment of an optimization problem with the antenna array gain as the objective function, the beam scanning angle, the peak sidelobe level as the constraint conditions, and the subarray arrangement and subarray-level amplitude-phase excitation as the constraint conditions, so as to ensure that the obtained Antenna arrays with irregular sub-arrays can satisfy the given constraints while maximizing the gain. Background technique [0002] Phased array antennas are widely used in various radar and communication system fields due to their flexible and fast beamforming and beam scanning capabilities. With the rapid development of wireless technology, the system puts forward more and more stringent technical index requirements for antenna arrays, w...

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Problems solved by technology

However, this method does not make full use of the contribution of the sub-array factor to the gain, and the sub-array factor plays a decisive role in the performance of irregular arrays, especially for the case of small number of sub-arrays or large cell spacing

Therefore, the optimization results of this method are not satisfactory for sub-arrays with a small number of sub-arrays such as dijoints or irregular antenna arrays with large element spacing.

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